This card is not just dual-GPU, but dual-PCB as well, according to NVIDIA's tradition. I.e. this is a 'sandwich' of two cards, each of which carries own GPU and memory, connected by a SLI bridge.

At that, while each PCB has 448-bit layout the dimensions are rather small, so we suppose that NVIDIA has tried to compact PCBs and that has increased their cost.

This card features GTX 280 GPUs (though made using the 55nm process technology). But if those are designed for a 512-bit bus, they don't use it fully, as the PCB has 448-bit layout and there's 896MB of memory instead of 1024MB.

Remember that the card is 270 mm long, like 8800 GTX/Ultra, so your enclosure has to have enough space for it. Also note card cover width that remains the same along its length. For this reason, the motherboard should have no ports or high capacitors within 30mm behind the PCI-E x16 slot (and this implies the neighbouring slot as well).

This card can receive an audio stream from a sound card to transmit it via a DVI-to-HDMI adapter. If this feature is important for you, make sure the adapter is bundled.

This card requires two additional power connections: 1 x 6-pin and 1 x 8-pin. This was made possible by the less consuming 55nm GPU core.

This card features an original TV-Out interface, so an adapter is required to output video via S-Video or RCA. Such adapters are usually bundled.

This card requires a DVI-to-D-Sub adapter to be connected to an analog monitor with a D-Sub interface.